Consent must be signed by hand or given in electronic form.
The declaration of consent must:
be dated; and
be readable during the entire required retention period.
Consent given in electronic form is permissible provided that:
it has been given using a method which unequivocally identifies the person concerned;
the chosen method prevents an overhasty decision;
it is protected against modification in accordance with the state of the art;
it is described in the application documents how the requirements specified in letters a–c are met.
The person concerned can choose to receive a copy of the information documents and the declaration of consent either on paper or in electronic form.